Switched reluctance motor assembly and method of assembling the same

ABSTRACT

Disclosed herein are a controller embedded switched reluctance motor assembly and a method of assembling thereof. Particularly, according to the present invention, a controller controlling the motor unit is installed in a housing, such that a separate process of installing the controller may be omitted, thereby facilitating assembling of the switched reluctance motor assembly. In addition, since a separate installation space of the controller is not required, a vacuum cleaner including the switched reluctance motor assembly may be miniaturized, and since the controller is installed in a state in which a motor unit and an insulator are coupled to each other and then installed in the housing, intermediate tests of the controller or the motor to unit may be easily performed, such that defects may be reduced. Further, the controller is in the housing, such that the controller may be protected from external disturbance.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent No. 10-2012-0123028, filed on Nov. 1, 2012, entitled “Switched Reluctance Motor Assembly and Method of Assembling the Same”, which is hereby incorporated by reference in its entirety into this application.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a switched reluctance motor assembly and a method of assembling thereof.

2. Description of the Related Art

Generally, a vacuum cleaner means a cleaning device generating suction force to remove foreign materials such as dust, or the like, by suction force, wherein the suction force is generated by a switched reluctance motor (SRM) assembly, which is so-called an SRM assembly.

In the SRM assembly, an impeller is installed in a cover including a suction port formed at an upper end thereof, a shaft is installed in a housing connected to a lower end of the cover so as to rotate the impeller, and a motor unit rotating the shaft is installed, as generally known. Here, it is widely known that the motor unit includes a rotor and a stator that generate attractive force and repulsive force using current to rotate the shaft.

In addition, the SRM assembly includes a diffuser pumping air discharged from an exit part of the impeller between the impeller and the motor unit, wherein the impeller and the diffuser are installed to be spaced apart from each other by a predetermined interval so as to increase pressure while the air passing through the impeller is transferred by the diffuser. Since this technology, which is a well-known technology, is disclosed in detail in U.S. Pat. Nos. 4,011,624, 4,920,608, and 6,125,498, an overlapped description will be omitted.

In this case, as described above, the impeller is driven and controlled by the motor unit, and a controller for controlling the motor unit is generally disposed to the outside of the housing.

However, in the case of the prior art, a space for installing the controller is additionally required, such that it was difficult to miniaturize the SRM assembly.

In addition, in the case of the prior art, processes of installing the controller and assembling the motor assembly should be separately performed, such that it may take a long time and a lot of effort for assembly.

Further, in the case of the prior art, since the controller is positioned at the outside of the housing, the controller may be directly affected by external disturbance, thereby causing a lack of stability.

PRIOR ART DOCUMENT Patent Document

(Patent Document 1) U.S. Pat. No. 4,011,624

(Patent Document 2) U.S. Pat. No. 4,920,608

(Patent Document 3) U.S. Pat. No. 6,125,498

SUMMARY OF THE INVENTION

The present invention has been made in an effort to provide a switched reluctance motor assembly in which a controller is installed in a housing having a motor unit mounted therein, such that since a separate space for installing the controller is not required, miniaturization may be implemented, the controller may be assembled together with the motor unit at the time of assembling the motor unit, such that assemblability may be improved, and controller is positioned in the housing to thereby be protected from external disturbance, such that stability may be improved, and a method of assembling the same.

According to a preferred embodiment of the present invention, there is provided a switched reluctance motor assembly including: a shaft forming a rotational center of the motor; a motor unit including a rotor and a stator so as to rotate the shaft; an impeller coupled to an upper portion of the shaft in an axial direction so as to suck air through a suction port formed in a cover; a diffuser transferring the air introduced by the impeller into the motor; an insulator coupled to the motor unit so as to receive the motor unit therein; a housing including the motor unit therein and formed so as to enclose outer peripheral portion of the shaft; and a controller mounted in an inner portion of the housing to control the motor unit.

The insulator may include an upper insulator installed at an upper surface of the motor unit and a lower insulator installed at a lower surface of the motor unit, and the controller may be installed at a lower surface of the lower insulator.

The lower insulator may include a lower insulator body having a plate shape and including a through hole at a central portion thereof so as to allow the shaft to penetrate therethrough and fixation parts extended from one portion of the lower insulator to the controller in a via shape, and the controller may include a control body having a plate shape and including a through hole at a central portion thereof so as to allow the shaft to penetrate therethrough and fixation holes formed in one portion of the control body having the fixation parts inserted thereinto.

The fixation part may be formed in plural, and one of the fixation parts may have a length longer than that of the others.

A vicinity of the fixation hole may be inclined so that a thickness of the vicinity becomes gradually thin toward the center of the fixation hole.

The fixation part may include an extension part extended downwardly from the insulator body and an insertion via extended from a distal end of the extension part in a cylindrical shape to be inserted into the fixation hole and including a screw thread, and a nut having stopper protruding upwardly in the axial direction at an upper surface thereof as a part disposed at a lower surface of the fixation hole to be screwed to the insertion via, a distal end of the stopper in a direction in which the screwed insertion via is unscrewed is formed to be vertical and a distal end of the stopper in a direction in which the insertion via is screwed is formed to be inclined, and a lower surface of the controller is provided with a stopper insertion part grooved in the same shape as that of the stopper.

The fixation hole of the controller may be provided with an elastic piece protruding inwardly, and a portion of an outer surface of the fixation part may be provided with a groove grooved so that the elastic piece is inserted.

A lower surface of the fixation part may have a wedge shape in which a width thereof is gradually reduced downwardly.

The switched reluctance motor assembly may further include a sensor magnet installed at a lower surface of a lower balancing member of the motor unit; and a hall sensor installed at a lower surface of the sensor magnet.

The switched reluctance motor assembly may further include a damper made of an elastic material and installed at the fixation part to absorb impact.

According to another preferred embodiment of the present invention, there is provided a method of assembling a controller embedded switched reluctance motor assembly including an impeller and a diffuser that sucks air through a suction port formed in a cover to transfer the sucked air, a housing including a motor unit mounted therein so as to rotate a shaft interlocked with the impeller, an insulator installed to the motor unit, and a controller installed at an inner portion of the housing to control the motor unit, the method including: installing upper and lower insulators at upper and lower portions of the motor unit, respectively; installing the controller at a lower surface of the lower insulator; connecting the controller and the motor unit to each other; and mounting the motor unit and the controller in the housing.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a cross-sectional view showing a cross-section of a switched reluctance motor assembly according to a preferred embodiment of the present invention;

FIG. 2 is a separated perspective view showing a structure in which a controller is installed in a motor unit according to the preferred embodiment of the present invention;

FIG. 3 is partially separated perspective view showing a structure in which a damper is installed to a fixation part of a lower insulator;

FIG. 4 is a partial cross-sectional view showing a fixation relationship between the controller and the lower insulator according to the preferred embodiment of the present invention;

FIG. 5 is a cross-sectional view showing a coupling relationship between the controller and a nut according to the preferred embodiment of the present invention;

FIG. 6 is a cross-sectional perspective view showing only the nut according to the preferred embodiment of the present invention;

FIG. 7 is a cross-sectional view showing a configuration in which the lower insulator and the controller according to the preferred embodiment of the present invention are coupled to each other;

FIG. 8 is a cross-sectional view showing another configuration in which the lower insulator and the controller according to the preferred embodiment of the present invention are coupled to each other; and

FIG. 9 is a flow chart showing a method of assembling a switched reluctance motor assembly according to the preferred embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The objects, features and advantages of the present invention will be more clearly understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant descriptions thereof are omitted. Further, in the following description, the terms “first”, “second”, “one side”, “the other side” and the like are used to differentiate a certain component from other components, but the configuration of such components should not be construed to be limited by the terms. Further, in the description of the present invention, when it is determined that the detailed description of the related art would obscure the gist of the present invention, the description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a cross-sectional view showing a cross-section of a switched reluctance motor assembly according to a preferred embodiment of the present invention; FIG. 2 is a separated perspective view showing a structure in which a controller is installed in a motor unit according to the preferred embodiment of the present invention; FIG. 3 is partially separated perspective view showing a structure in which a damper is installed to a fixation part of a lower insulator; FIG. 4 is a partial cross-sectional view showing a fixation relationship between the controller and the lower insulator according to the preferred embodiment of the present invention; FIG. 5 is a cross-sectional view showing a coupling relationship between the controller and a nut according to the preferred embodiment of the present invention; FIG. 6 is a cross-sectional perspective view showing only the nut according to the preferred embodiment of the present invention; FIG. 7 is a cross-sectional view showing a configuration in which the lower insulator and the controller according to the preferred embodiment of the present invention are coupled to each other; FIG. 8 is a cross-sectional view showing another configuration in which the lower insulator and the controller according to the preferred embodiment of the present invention are coupled to each other; and FIG. 9 is a flow chart showing a method for assembling a switched reluctance motor assembly according to the preferred embodiment of the present invention.

The present invention relates to a switched reluctance motor assembly capable of implementing miniaturization of a vacuum cleaner, increasing assemblability, protecting a controller from external disturbance to increase stability by mounting the controller controlling a motor unit in a housing, as described above.

As shown in FIG. 1, a switched reluctance motor assembly 100 according to the preferred embodiment of the present invention may include an impeller 160 and a diffuser 170 sucking air through a suction port 111 formed in a cover 110 to transfer the sucked air, a housing 120 including a motor unit 140 mounted therein in order to rotate a shaft S interlocked with the impeller 160, an insulator 150 installed to the motor unit 140, and a controller 130 installed at an inner portion of the housing 120 to control the motor unit 140.

Here, configurations of the impeller 160 and the diffuser 170 are described above and a configuration in which air is sucked through the suction port 111 by rotation of the impeller 160 is also described above. In addition, the housing 120 may be installed to a lower end of the cover 110 at which the suction port 111 is formed.

Meanwhile, the motor unit 140 may be installed with the insulator 150 for insulation with a coil wound around a stator inserted therein. Here, in the switched reluctance motor assembly according to the preferred embodiment of the present invention, the controller 130 may be installed in the housing 120 and be installed at a lower surface of the motor unit 140 as shown in FIG. 1.

The insulator 150 may include an upper insulator 151 installed at an upper surface of the motor unit 140 and a lower insulator 152 installed at a lower surface of the motor unit 140. That is, in order to more stably secure insulation performance of the motor unit 140, the upper and lower insulator 151 and 152 may be installed at the upper and lower surfaces of the motor unit 140, respectively. In this case, the controller 130 may be installed at a lower surface of the lower insulator 152, and be fixed to the lower surface of the lower insulator 152 or a bottom surface of the housing 120.

Meanwhile, the lower insulator 152 may include a lower insulator body 152 c having a plate shape and including a through-hole 152 a formed at a central portion thereof so as to allow the shaft S to penetrate therethrough and fixation parts IN extended from one portion of the lower insulator body 152 c to the controller 130 in a via shape, as shown in FIG. 2.

The controller 130 may include a control body 131 having a plate shape and including a through-hole 132 formed at a central portion thereof so as to allow the shaft S to penetrate therethrough and fixation holes 133 formed in one portion of the control body 131 having the fixation parts IN inserted thereinto.

That is, the fixation part IN extended from the lower insulator 152 downwardly as viewed in drawings (to the controller) may be inserted into the fixation hole 133, such that the lower insulator 152 and the controller 130 may be fixed to each other.

Here, the fixation part IN may include 4 fixation parts IN1, IN2, IN3, and IN4, and the fixation hole 133 may also include four fixation holes 133 a, 133 b, 133 c, and 133 d, corresponding thereto as shown in FIG. 2.

Meanwhile, the lower insulator 152 may include insertion protrusion parts 152 b protruding upwardly as viewed in FIG. 2 from the lower insulator body 152 c to be inserted into space parts 141 b of a stator 141 as shown in FIG. 2. The insertion protrusion parts 152 b may be formed to be spaced apart from each other in a wall shape and inserted into four space parts 141 b, respective, as shown in FIG. 2. Meanwhile, the lower insulator 152 may include a lower protrusion part 152 d having a wall shape and connecting between the fixation parts IN to increase structural strength of the lower insulator 152.

In addition, the space parts 141 b of the stator 141 are empty spaces between winding coil (not shown) wound around a stator part adjacent thereto as widely known, and a detailed description thereof will be omitted.

The fixation parts IN may include extension parts 152 e extended from the lower surface of the lower insulator body 152 c to the controller 130 and insertion vias 152 f extended from distal ends of the extension parts 152 e to the controller 130 as shown in FIG. 2. Here, the lower protrusion part 152 d may connect between the extension parts 152 e, and the insertion via 152 fmay be inserted into the fixation hole 133 of the controller 130. In this case, the extension part 152 e may have a rectangular cross-section, and the insertion via 152 f may have a circular cross-section, as shown in FIG. 2. However, a shape of the fixation part IN is only an example for describing the present invention, and the fixation part may have any shape as long as the fixation part may be inserted into and fixed to the fixation hole 133.

Meanwhile, a plurality of fixation parts IN may be formed as shown in FIG. 2, and among them, one the fixation parts may have a length longer than that of the others. This is to control a height of a step at the time of assembling the lower insulator 152 and the controller 130 to thereby easily assemble them. That is, when one fixation part having a long length is first inserted into the fixation hole 133, positions of the others may be adjusted so as to be automatically inserted, thereby easily assembling the lower insulator 152 and the controller 130. For example, the fixation part IN3 positioned at a left lower corner in FIG. 2 is formed to have a length longer than those of other fixation parts IN1, IN2, and 1N4, and after the fixation part IN3 having a long length is first inserted into the fixation hole 133, the rest of the fixation parts IN1, IN2, and 1N4 are insertedly fixed.

Meanwhile, as shown in FIG. 3, dampers B installed on the fixation parts IN to absorb impact and made of an elastic material may be further included. That is, as shown in FIG. 3, dampers B1, B2, B3, and B4 are installed on the four fixation parts IN, respectively, to absorb impact or vibration generated inside and outside of the housing. As a material of the damper B, any material having elasticity such as rubber, or the like, may be used. Here, the damper B may have a hollow shape and the fixation part IN penetrates therethrough as shown in FIG. 3, and the damper B may be formed to have a shape in which a surface (upper surface in FIG. 3) is opened and a lower surface of the damper is not opened, such that the fixation part IN may be insertedly received in the damper B.

The controller 130 may include the plate shaped control body 131 including the through hole 132 formed at a central portion thereof so as to allow the shaft S to penetrate therethrough and the fixation holes 133 formed in the portions of the control body 131 and having the fixation part IN inserted thereinto as described above, wherein four fixation holes 133 may be formed as shown in FIG. 3, corresponding to the number of fixation parts IN. Therefore, the numbers of fixation parts IN and fixation holes 133 are not limited in the present invention. In addition, the controller 130 may be a printed circuit board (PCB), similar to the prior art, but the present invention is not limited thereto. That is, a shape or a kind of the controller 130 is not limited as long as the controller may control the motor unit 140.

In this case, as shown in FIG. 4, a vicinity of the fixation hole 133 may be formed to be inclined so that a thickness of the vicinity is gradually reduced toward the center of the fixation hole 133, such that the fixation part IN may be more easily fixed. That is, when the above-mentioned fixation part IN is inserted into the fixation hole 133 of the controller 130, even though the fixation part IN is not positioned at an accurate position, in the case in which the fixation part is positioned at the vicinity, the fixation part IN may be automatically introduced into the fixation hole 133 by an inclined part 135 of the vicinity of the fixation hole 133 as described above, such that the fixation part may be more easily assembled.

In order to stably fix the fixation part IN and the fixation hole 133 to each other, as shown in FIGS. 5 and 6, the fixation part IN may include the extension part 152 e extended downwardly from the lower insulator body 152 c and the insertion via 152 f extended from the distal end of the extension part 152 e in a cylindrical shape, inserted into the fixation hole 133, and including a screw thread 152 f-3 formed on an outer surface thereof.

Here, as shown in FIGS. 5 and 6, as a part disposed at a lower surface of the fixation hole 133 of the controller 130 to be screwed to the insertion via 152 f, a nut N having stoppers N1 protruding in a height direction at an upper surface thereof is included, such that the fixation part and the fixing hole may be stably fixed to each other.

Meanwhile, as described above, after the fixation part and the fixing hole is fixed to each other using the nut N, a locking state of the nut N may be loosened according to usage environment, such that the nut N may be unscrewed. In order to prevent the nut from being unscrewed, the stopper N1 is formed to protrude, wherein a distal end N1 c of the stoppers N1 in a direction (direction I) in which the screwed insertion via 152 f is unscrewed is formed in a vertical direction, a distal end N1 a in a direction (direction II) in which the insertion via 152 f is screwed is inclined so that a height thereof is gradually reduced toward the direction II, and an upper surface N1 b may be formed to be flat.

Meanwhile, the lower surface of the controller 130 may be provided with stopper insertion parts 131 a having the same shape as that of the stopper N1, and the stopper N1 may be inserted thereinto. That is, when the nut N is closely adhered to the lower surface of the controller 130 while the nut N and the insertion via 152 f are screwed to each other, the stopper N1 of the nut N is inserted to the stopper insertion part 131 a. In this case, since the distal end N1 c in the direction (direction I) in which the nut N is unscrewed contacts a vertical surface of the stopper insertion part 131 a, even though vibration, or the like is generated in the outside, the nut N may not be rotated in the direction (direction I) in which the nut N is unscrewed, thereby maintaining the screwed state.

Meanwhile, four stoppers Ni may protrude on the nut N as shown in FIG. 6, but the present invention is not limited thereto. Although the number of stopper

is changed, as long as the stopper may serve to prevent the nut N from being unscrewed, all modifications of the stopper should be considered to be within the scope of the present invention.

As shown in FIG. 7, an elastic piece 134 protruding inwardly of the fixation hole 133 of the controller 130 may be formed, and a groove 152 f-1 grooved at a portion of an outer surface of the fixation part IN so that the elastic piece 134 is inserted thereinto may be included. That is, in the case in which the fixation part IN is inserted into the fixation hole 133, the elastic piece 134 is deformed downwardly as viewed in FIG. 7, and when the groove 152 f-1 of the fixation part IN is arrived at a predetermined position, an original shape of the elastic piece 134 is recovered and the elastic piece 134 is inserted into the groove 152 f-1, such that the fixation part IN and the fixation hole 133 may be easily fixed to each other.

Meanwhile, although the case in which the elastic piece 134 and the groove 152 f-1 have rectangular cross-sections is shown, the case is only an example for describing the present invention. Therefore, as long as the elastic piece 134 may be elastically deformed to be inserted into the groove 152-f, the elastic piece and the groove 152 f-1 having any shape should be considered to be with the scope of the present invention.

As shown in FIG. 8, a lower portion of the fixation part IN may have a wedge shape in which a width thereof is gradually reduced downwardly as viewed in FIG. 8. That is, as described above, the fixation part IN inserted downwardly in FIG. 8 while deforming the elastic piece 134, and here, when the lower portion of the fixation part IN has the wedge shape 152 f-2, the fixation part IN may be more easily inserted.

As shown in FIG. 1, a rotor electrode sensing device 180 configured of a sensor magnet 181 installed at a lower surface of a lower balancing member 132 of the motor unit 140 and a hall sensor 182 installed at a lower surface of the sensor magnet may be included. As widely known, it is required to sense an electrode of a rotor 142 in order to control the switched reluctance motor. To this end, the switched reluctance motor includes sensor magnet 181 and the hall sensor 182 as described above.

Action of sucking air by the above-mentioned controller embedded switched reluctance motor assembly 100 according to the preferred embodiment of the present invention will be described with reference to FIG. 1.

First, as described above, the shaft S rotates by the motor unit 140, and the impeller 160 also rotates by the rotating shaft S. Air is introduced through the suction port 111 by the rotating impeller 160 and transferred to the diffuser 170. Here, the shaft S may be supported by upper and lower bearings 191 and 192 as shown in FIG. 1. Meanwhile, upper and lower portions of the motor unit 140 may be provided with balancing members 131 and 132 to implement stable rotation.

The motor unit 140 is controlled by the controller 130 as described above, wherein the controller 130 is installed in the housing 120 to control the motor unit 140 so that rotation speed of the impeller 160 arrives at optimal speed.

Hereinafter, a method of (S100) assembling a controller embedded switched reluctance motor assembly 100 according to the preferred embodiment of the present invention described above will be described with reference to FIG. 9.

The controller embedded switched reluctance motor assembly 100 according to the preferred embodiment of the present invention may include an impeller 160 and a diffuser 170 sucking air through a suction port 111 formed in a cover 110 to transfer the sucked air, a housing 120 including a motor unit 140 mounted therein in order to rotate a shaft S interlocked with the impeller 160, an insulator 150 installed to the motor unit 140, and a control part 130 installed at one side of an inner portion of the housing 120 to control the motor unit 140.

In order to manufacture the controller embedded switched reluctance motor assembly 100, first, a step of installing upper and lower insulators 151 and 152 at upper and lower portions of the motor unit 140, respectively (S110, hereinafter, referred to as a first step) is performed. A coil wound around the stator part included in the motor unit 140 may be electrically insulated by the first step (S110).

After performing the first step (S110), a step of installing the controller 130 at a lower surface of the lower insulator 152 (S120, hereinafter, referred to as a second step) is performed. In order to perform the second step (S120), an insertion via 152 f of a fixation part IN may be inserted into and fixed to a fixation hole 133 of the controller as described above, and in order to stably fix the fixation part, an outer surface of the insertion via 152 f may be formed with a screw thread 152 f-3 and, a nut N screwed to the screw thread may be included. Assembling of the motor unit 140 is completed by the second step (S120) described above.

After the motor unit 140 is assembled by the second step (S120), a step of connecting the controller 130 and the motor unit 140 to each other (S130, hereinafter, referred to as a third step) is performed. In the third step (S130), a wire drawn from the motor unit 140) may be soldered to thereby be connected to the controller 130, for example, a terminal of a printed circuit board (PCB). After performing the third step (S130), a step of mounting the motor unit 140 and the controller 130 in the housing 120 (S140, hereinafter, referred to as a fourth step) is performed. The motor unit 140 and the controller 130 are installed in the housing in a state in which the motor unit 140 and the controller 130 are integrated with each other by the fourth step (S140), such that an assembling process may be simplified, and particularly, an intermediate test, that is, a test on each of the motor unit 140 and the controller 130, a test whether or not the motor unit 140 and the controller 130 are firmly coupled to each other, or the like may be performed, thereby making it possible to prevent product defects.

As described above, according to the controller embedded switched reluctance motor assembly 100 and the method (S100) of assembling the same, since the controller 130 is installed in the housing, a separate space for installing the controller 130 is not required, such that miniaturization may be implemented. In addition, at the time of assembling the motor unit 140, the controller 130 may be simultaneously assembled, thereby improving assemblability, and the controller 130 is positioned in the housing 120 so as to be protected from external disturbance, thereby improving stability.

According to the preferred embodiment of the present invention, the controller is installed in the housing in which the motor unit is mounted, such that a separate space for installing the controller is not required, thereby making it possible to implement miniaturization.

In addition, the controller may be assembled together with the motor unit at the time of assembling the motor unit, such that assemblability may be improved, thereby making it possible to improve productivity of a device including the motor assembly.

Further, the controller is positioned in the housing, such that the controller may be protected from external disturbance, thereby making it possible to further improve stability and reliability of operation and control of the motor assembly.

Although the embodiments of the present invention have been disclosed for illustrative purposes, it will be appreciated that the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention.

Accordingly, any and all modifications, variations or equivalent arrangements should be considered to be within the scope of the invention, and the detailed scope of the invention will be disclosed by the accompanying claims. 

What is claimed is:
 1. A switched reluctance motor assembly comprising: a shaft forming a rotational center of the motor; a motor unit including a rotor and a stator so as to rotate the shaft; an impeller coupled to an upper portion of the shaft in an axial direction so as to suck air through a suction port formed in a cover; a diffuser transferring the air introduced by the impeller into the motor; an insulator coupled to the motor unit so as to receive the motor unit therein; a housing including the motor unit therein and formed so as to enclose outer peripheral portion of the shaft; and a controller mounted in an inner portion of the housing to control the motor unit.
 2. The switched reluctance motor assembly as set forth in claim 1, wherein the insulator includes an upper insulator installed at an upper surface of the motor unit and a lower insulator installed at a lower surface of the motor unit, and the controller is installed to a lower surface of the lower insulator.
 3. The switched reluctance motor assembly as set forth in claim 2, wherein the lower insulator includes a lower insulator body having a plate shape and including a through hole at a central portion thereof so as to allow the shaft to penetrate therethrough and fixation parts extended from one portion of the lower insulator to the controller in a via shape, and the controller includes a control body having a plate shape and including a through hole at a central portion thereof so as to allow the shaft to penetrate therethrough and fixation holes formed in one portion of the control body having the fixation parts inserted thereinto.
 4. The switched reluctance motor assembly as set forth in claim 3, wherein the fixation part is formed in plural, and one of the fixation parts has a length longer than that of the others.
 5. The switched reluctance motor assembly as set forth in claim 3, wherein a vicinity of the fixation hole is inclined so that a thickness of the vicinity becomes gradually thin toward the center of the fixation hole.
 6. The switched reluctance motor assembly as set forth in claim 3, wherein the fixation part includes an extension part extended downwardly from the insulator body and an insertion via extended from a distal end of the extension part in a cylindrical shape to be inserted into the fixation hole and including a screw thread, and a nut having stopper protruding upwardly in the axial direction at an upper surface thereof as a part disposed at a lower surface of the fixation hole to be screwed to the insertion via, a distal end of the stopper in a direction in which the screwed insertion via is unscrewed is formed to be vertical and a distal end of the stopper in a direction in which the insertion via is screwed is formed to be inclined, and a lower surface of the controller is provided with a stopper insertion part grooved in the same shape as that of the stopper.
 7. The switched reluctance motor assembly as set forth in claim 3, wherein the fixation hole of the controller is provided with an elastic piece protruding inwardly, and a portion of an outer surface of the fixation part is provided with a groove grooved so that the elastic piece is inserted.
 8. The switched reluctance motor assembly as set forth in claim 7, wherein a lower surface of the fixation part has a wedge shape in which a width thereof is gradually reduced downwardly.
 9. The switched reluctance motor assembly as set forth in claim 1, further comprising: a sensor magnet installed at a lower surface of a lower balancing member of the motor unit; and a hall sensor installed at a lower surface of the sensor magnet.
 10. The switched reluctance motor assembly as set forth in claim 3, further comprising a damper made of an elastic material and installed at the fixation part to absorb impact.
 11. A method of assembling a controller embedded switched reluctance motor assembly including an impeller and a diffuser that sucks air through a suction port formed in a cover to transfer the sucked air, a housing including a motor unit mounted therein so as to rotate a shaft interlocked with the impeller, an insulator installed to the motor unit, and a controller installed at an inner portion of the housing to control the motor unit, the method comprising: installing upper and lower insulators at upper and lower portions of the motor unit, respectively; installing the controller at a lower surface of the lower insulator; connecting the controller and the motor unit to each other; and mounting the motor unit and the controller in the housing. 